NAKASU Taizo

J-GLOBAL         Last updated: Apr 2, 2019 at 19:22
 
Avatar
Name
NAKASU Taizo
E-mail
nakasutohoku.ac.jp
Affiliation
Tohoku University
Section
Faculty of Science and Engineering
Research funding number
40801254

Research Areas

 
 

Academic & Professional Experience

 
Apr 2018
 - 
Mar 2019
Assistant Professor, Department of Electrical Engineering and Bioscience, Waseda University
 
Apr 2017
 - 
Mar 2018
research associate, Department of Electrical Engineering and Bioscience, Waseda University
 

Education

 
Apr 2008
 - 
Mar 2012
Waseda University
 
Apr 2012
 - 
Mar 2014
Waseda University
 

Awards & Honors

 
Sep 2013
II-VI 2013 Best Student Presentation Award, 16th International Conference on II-VI Compounds and Related Materials
 
May 2017
JSAP Young Scientist Award
 

Published Papers

 
Wei Che Sun, Taizo Nakusu, Keisuke Odaka, Masakazu Kobayashi, Toshiaki Asahi
Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics   35    Jul 2017   [Refereed]
© 2017 American Vacuum Society. ZnTe electro-optic waveguide device has a great potential for the practical applications. The introduction of low Mg% cladding layer to the ZnMgTe/ZnTe/ZnMgTe waveguide structure was performed to circumvent the effe...
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi, Toshiaki Asahi
Journal of Crystal Growth   468 635-637   Jun 2017   [Refereed]
© 2016 Elsevier B.V. Zinc telluride layers were grown on highly-lattice-mismatched sapphire substrates by molecular beam epitaxy, and their crystallographic properties were studied by means of X-ray diffraction pole figures. The crystal quality of...
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi, Toshiaki Asahi
Journal of Electronic Materials   46 2248-2253   Apr 2017   [Refereed]
© 2016, The Minerals, Metals & Materials Society. ZnTe thin films on sapphire substrate with nanofaceted structure have been studied. The nanofaceted structure of the m-plane (10-10) sapphire was obtained by heating the substrate at above 1100°C...
NAKASU Taizo
Waseda University      Mar 2017   [Refereed]
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi
Japanese Journal of Applied Physics   56    Jan 2017   [Refereed]
© 2017 The Japan Society of Applied Physics. Domain structures of ZnTe layers grown on a-plane sapphire substrates were investigated by changing the crystallographic properties of the surface and interface. Pole figure images were obtained and we ...
Taizo Nakasu, Shota Hattori, Wei Che Sun, Masakazu Kobayashi
Physica Status Solidi (B) Basic Research   253 2265-2269   Nov 2016   [Refereed]
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ZnTe/sapphire heterostructures have attracted attention for their suitable properties as a terahertz wave detector material. In this study, we focused on the selective growth of ZnTe on SiO2-mask...
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Takeru Kizu, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi
Journal of Electronic Materials   45 4742-4746   Oct 2016   [Refereed]
© 2016, The Minerals, Metals & Materials Society. Zinc telluride (ZnTe) epilayers were grown on S-plane (10 1 ¯ 1) sapphire substrates by molecular beam epitaxy, and the epitaxial relationships between the two were compared with data previously ...
Wei Che Sun, Fukino Kazami, Jing Wang, Taizo Nakasu, Shota Hattori, Takeru Kizu, Yuki Hashimoto, Masakazu Kobayashi, Toshiaki Asahi
Japanese Journal of Applied Physics   55    Aug 2016   [Refereed]
© 2016 The Japan Society of Applied Physics. A ZnMgTe/ZnTe electro-optic (EO) waveguide has great potential to be utilized for practical applications. A low-dislocation ZnMgTe/ZnTe waveguide can be fabricated when the cladding layer thickness is b...
Taizo Nakasu, Takeru Kizu, Wei Che Sun, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
2016 Compound Semiconductor Week, CSW 2016 - Includes 28th International Conference on Indium Phosphide and Related Materials, IPRM and 43rd International Symposium on Compound Semiconductors, ISCS 2016      Aug 2016
© 2016 IEEE. ZnTe thin films were grown on m-plane sapphire substrates with nano-faceted structure by MBE. The growth process of the ZnTe thin film was analyzed by AFM. The influence of the nano-facet on the crystal quality of the epilayer was stu...
Taizo Nakasu, Shota Hattori, Takeru Kizu, Wei Che Sun, Fukino Kazami, Yuki Hashimoto, Masakazu Kobayashi, Toshiaki Asahi
Physica Status Solidi (C) Current Topics in Solid State Physics   13 435-438   Jul 2016   [Refereed]
Copyright © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ZnTe epilayers were grown on R -plane (Formula presented.) and S -plane (Formula presented.) sapphire substrates by molecular beam epitaxy, and the crystal orientation and the optical p...
Taizo Nakasu, Takeru Kizu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi
Journal of Electronic Materials   45 2127-2132   Apr 2016   [Refereed]
© 2016, The Minerals, Metals & Materials Society. ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-sm...
Fukino Kazami, Wei Che Sun, Kosuke Taguri, Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Takeru Kizu, Masakazu Kobayashi, Toshiaki Asahi
Physica Status Solidi (B) Basic Research   253 635-639   Apr 2016   [Refereed]
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. ZnMgTe/ZnTe waveguide is a high potential electro-optical device. Thick and high Mg composition cladding layers are required for high optical performance waveguides. However, adding Mg would inc...
Wei Che Sun, Fukino Kazami, Jing Wang, Taizo Nakasu, Shota Hattori, Takeru Kizu, Yuki Hashimoto, Masakazu Kobayashi, Toshiaki Asahi
MRS Advances   1 1721-1727   Jan 2016   [Refereed]
© 2016 Materials Research Society. ZnMgTe(Cladding)/ZnTe(Core)/ZnMgTe(Cladding) thin film waveguide had been grown by molecular beam epitaxy (MBE) and presented a great potential to be a high performance Electro-optical (EO) modulator. For a low p...
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
Journal of Crystal Growth   425 191-194   Jul 2015   [Refereed]
© 2015 Elsevier B.V. All rights reserved. ZnTe epilayers were grown on transparent a-plane (11-20) sapphire substrates by molecular beam epitaxy (MBE). The insertion of a lowerature nucleated buffer layer was carried out, and the influence of the ...
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Takeru Kizu, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Masakazu Kobayashi
Japanese Journal of Applied Physics   54    Jan 2015   [Refereed]
© 2015 The Japan Society of Applied Physics. ZnTe epilayers were grown on r-plane (11¯02) and n-plane (112¯3) sapphire substrates by molecular beam epitaxy. The ZnTe domain distribution in the layer and the influence of the substrates' c-plane loc...
Taizo Nakasu, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
Journal of Electronic Materials   43 921-925   Jan 2014   [Refereed]
ZnTe epilayers have been grown on 2°-tilted m-plane 10 1 ̄ 0 sapphire substrates by molecular beam epitaxy. Pole figure imaging was used to study the domain distribution within the layer, and the pole figures of 111, 220, 004, and 422 ZnTe and 30 ...
Taizo Nakasu, Wei Che Sun, Sotaro Yamashita, Takayuki Aiba, Kosuke Taguri, Masakazu Kobayashi, Toshiaki Asahi, Hiroyoshi Togo
Physica Status Solidi (C) Current Topics in Solid State Physics   11 1182-1185   Jan 2014   [Refereed]
ZnTe epilayers were grown on transparent (10-10) oriented (m -plane) sapphire substrates by molecular beam epitaxy (MBE). Pole figure imaging was used to study the domain distribution within the layer. (211)-oriented ZnTe domains were formed on m ...
Taizo Nakasu, Masakazu Kobayashi, Toshiaki Asahi, Hiroyoshi Togo
Japanese Journal of Applied Physics   53    Jan 2014   [Refereed]
ZnTe epilayers were grown on transparent (10̄10) oriented (m-plane) sapphire substrates by molecular beam epitaxy (MBE). The insertion of a lowtemperature buffer layer was carried out, and the influence of the buffer layer annealing on crystallogr...
Wei Che Sun, Taizo Nakasu, Kosuke Taguri, Takayuki Aiba, Sotaro Yamashita, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
Physica Status Solidi (C) Current Topics in Solid State Physics   11 1252-1255   Jan 2014   [Refereed]
ZnMgTe/ZnTe/ZnMgTe thin film waveguide with high crystal quality were grown by molecular beam epitaxy (MBE). The in-plane mismatch between the ZnMgTe cladding layers and ZnTe core layer was about 0.02% which was measured by X-ray reciprocal space ...
Taizo Nakasu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Masakazu Kobayashi
Journal of Applied Physics   116    Oct 2014   [Refereed]
© 2014 AIP Publishing LLC. The electrooptic effect in ZnTe has recently attracted research attention, and various device structures using ZnTe have been explored. For application to practical terahertz wave detector devices based on ZnTe thin film...
Taizo Nakasu, Masakazu Kobayashi, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
Physica Status Solidi (C) Current Topics in Solid State Physics   10 1381-1384   Nov 2013   [Refereed]
Single-crystalline and single domain ZnTe thin films are sought for high-performance terahertz wave detectors, and ZnTe/sapphire heterostructures were considered since the Electro-Optical (EO) effect could be obtained only from epilayers. ZnTe epi...
Taizo Nakasu, Yuki Kumagai, Kimihiro Nishimura, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
Applied Physics Express   5    Sep 2012   [Refereed]
ZnTe epilayers were grown on transparent substrates by molecular beam epitaxy. The insertion of a low-temperature buffer layer was carried out, and the influence of the buffer layer thickness and its annealing on the crystallographic property were...

Misc

 
中須大蔵, 小林正和, 朝日聡明
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   78th ROMBUNNO.5p‐A411‐1   Aug 2017
中須大蔵, 小高圭佑, 小林正和, 朝日聡明
応用物理学会春季学術講演会講演予稿集(CD-ROM)   64th ROMBUNNO.17a‐513‐11   Mar 2017
中須大蔵, SUN Wei‐Che, 小林正和, 朝日聡明
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   77th ROMBUNNO.13p‐D61‐4   Sep 2016
風見蕗乃, SUN Wei‐Che, WANG Jing, 中須大蔵, 服部翔太, 木津健, 橋本勇輝, 小林正和, 朝日聡明
電気学会全国大会講演論文集(CD-ROM)   2016 ROMBUNNO.2‐092   Mar 2016
玉川陽菜, 中須大蔵, 服部翔太, 木津健, 橋本勇輝, 小高圭佑, 山本洋輔, SUN Wei‐Che, 風見蕗乃, WANG Jing, 小林正和, 朝日聡明
電気学会全国大会講演論文集(CD-ROM)   2016 ROMBUNNO.2‐091   Mar 2016

Conference Activities & Talks

 
Epitaxial Relationship Analysis of MBE grown ZnTe/sapphire Structure
Taizo Nakasu, Masakazu Kobayashi, Toshiaki Asahi
20th European Workshop on Molecular Beam Epitaxy   Feb 2019   
Growth of High quality ZnTe epilayers on Sapphire substrates with Multi-Buffer Layer
Taizo Nakasu, Masakazu Kobayashi, Toshiaki Asahi
18th International Conference on II-VI Compound and Related Materials   Sep 2017   
Crystal Growth Mechanism of ZnTe epilayers on Sapphire Substrate
Taizo Nakasu, Masakazu Kobayashi, Toshiaki Asahi
59th Annual Electronic Materials Conference   Jun 2017   
Defect Density Reduction in Core layer of ZnTe Electro‐Optical Waveguide by Low Lattice Mismatched Interfaces
Wei Che Sun, Taizo Nakasu, Keisuke Odaka, Masakazu Kobayashi, Toshiaki Asahi
The 44th Conference on the Physics and Chemistry of Surfaces and Interfaces   Jan 2017   
Influence of nano-facet structures on the orientation of the ZnTe film on sapphire substrate
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi, Toshiaki Asahi
32nd North American Molecular Beam Epitaxy Conference   Sep 2016   
Influence of the sapphire substrate surface treatment on the domain structure of the ZnTe epilayer
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi, Toshiaki Asahi
19th International Conference on Molecular Beam Epitaxy   Sep 2016   
Growth and characterization of ZnTe layers on severely lattice mismatched sapphire substrates by MBE
Taizo Nakasu, Wei Che Sun, Masakazu Kobayashi, Toshiaki Asahi
18th International Conference on Crystal Growth and Epitaxy   Aug 2016   
The growth process analysis of the ZnTe layer on the m-plane sapphire substrate with nano-facet structures
Taizo Nakasu, Takaru Kizu, Wei Che Sun, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
43rd International Symposium on Compound Semiconductors   Jun 2016   
Growth and Crystal Orientation of ZnTe on m-Plane Sapphire with Nano-faceted Structure
Taizo Nakasu, Shota Hattori, Yuki Hashimoto, Wei Che Sun, Jing Wang, Masakazu Kobayashi, Toshiaki Asahi
58th Annual Electronic Materials Conference   Jun 2016   
Epitaxial lateral overgrowth Epitaxial of ZnTe on sapphire substrates using SiO2 mask
Shota Hattori, Taizo Nakasu, Takeru Kizu, Yuki Hashimoto, Wei Che Sun, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
The 43rd Conference on the Physics and Chemistry of Surfaces and Interfaces   Jan 2016   
Two-step-index ZnMgTe/ZnTe Waveguide Structures with Improved Crystal Quality
Wei Che Sun, Fukino Kazami, Jing Wang, Taizo Nakasu, Shota Hattori, Takeru Kizu, Yuki Hashimoto, Masakazu Kobayashi, Toshiaki Asahi
2015 MRS Fall Meeting   Dec 2015   
Electro-Optic Characteristics Improvement of ZnMgTe/ZnTe Waveguide Devices
Wei Che Sun, Fukino Kazami, Jing Wang, Taizo Nakasu, Shota Hattori, Takeru Kizu, Yuki Hashimoto, Masakazu Kobayashi, Toshiaki Asahi
2015 International Conference on Solid State Devises and Materials   Sep 2015   
ZnTe Layers on R- and S-plane Sapphire Substrates
Taizo Nakasu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, T Kizu, W. Sun, K. Taguri, F. Kazami, Y. Hashimoto, S. Ozaki, M. Kobayashi, and T. Asahi
17th International Conference on II-VI Compound and Related Materials   Sep 2015   
Influence of the lattice mismatch strain on the surface morphology of ZnMgTe/ZnTe electro-optical waveguide structure
Fukino Kazami, Wei Che Sun, Kosuke Taguri, Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Takeru Kizu, Masakazu Kobayashi, Toshiaki Asahi
40th International Symposium on Compound Semiconductors   Jun 2015   
Surface texture and crystallinity variation of ZnTe epilayers grown on the step-terrace structure of the sapphire substrate
Taizo Nakasu, Takeru Kizu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi
57th Annual Electronic Materials Conference   Jun 2015   
Epitaxial Relationship Analysis between ZnTe Epilayers and Sapphire Substrates
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Takeru Kizu, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi
57th Annual Electronic Materials Conference   Jun 2015   
Control of Domain Orientation during the MBE Growth of ZnTe on a-Plane Sapphire
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
18th International Conference on Molecular Beam Epitaxy   Sep 2014   
Effect of (0001) surface on the orientation of ZnTe epilayer/sapphire substrate
Taizo Nakasu, Takayuki Aiba, Sotaro Yamashita, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Masakazu Kobayashi, Toshiaki Asahi
56th Annual Electronic Materials Conference   Jun 2014   
Molecular Beam Epitaxy Growth of ZnTe/ZnMgTe Waveguide Structures and Propagation Light Intensity Change by the Applied Field
Wei Che Sun, Taizo Nakasu, Kosuke Taguri, Takayuki Aiba, Sotaro Yamashita, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
The 30th North American Conference on Molecular Beam Epitaxy   Oct 2013   
Growth and Electro-Optical characterization of ZnMgTe/ZnTe waveguide by molecular beam epitaxy
Wei Che Sun, Taizo Nakasu, Kosuke Taguri, Takayuki Aiba, Sotaro Yamashita, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
The 16th International Conference on II-VI Compound and Related Materials   Sep 2013   
MBE Growth and Characterization of ZnTe Epilayers on m-Plane Sapphire Substrates
Taizo Nakasu, Wei Che Sun, Sotaro Yamashita, Takayuki Aiba, Kosuke Taguri, Masakazu Kobayashi, Toshiaki Asahi, Hiroyoshi Togo
The 16th International Conference on II-VI Compound and Related Materials   Sep 2013   
(211) oriented domain formation during the Growth of ZnTe on m-plane sapphire by MBE
Taizo Nakasu, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
55th Annual Electronic Materials Conference   Jun 2013   
(211) oriented ZnTe growth on m-plane sapphire by MBE
Taizo Nakasu, Masakazu Kobayashi, Hiroyoshi Togo, Toshiaki Asahi
40th International Symposium on Compound Semiconductors   May 2013   
MBE growth and pole figure analysis of ZnTe epilayers on sapphire substrates
Taizo Nakasu, Masakazu Kobayashi
17th European Molecular Beam Epitaxy Workshop   Mar 2013   
Growth of AgGaTe2 Layers by a Closed space Sublimation Method
Aya Uruno, Taizo Nakasu, Masakazu Kobayashi
54th Annual Electronic Materials Conference   Jun 2012   
Growth of ZnTe epilayers on severely lattice mismatched c-plane sapphire by MBE
Taizo Nakasu, Yuki Kumagai, Kimihiro Nishimura, Aya Uruno, Masakazu Kobayashi
54th Annual Electronic Materials Conference   Jun 2012   
MBE Growth of ZnTe epilayers on m-plane (10-10) sapphire substrates
Taizo Nakasu, Yuki Kumagai, Kimihiro Nishimura, Masakazu Kobayashi
17th International Conference on Molecular Beam Epitaxy   Sep 2012   
Fabrication of ZnMgTe/ZnTe/ZnMgTe Waveguide Structures
Yuki Kumagai, Taizo Nakasu, Kimihiro Nishimura, Masakazu Kobayashi
Asia-Pacific Microwave Photonics Conference 2012   May 2012